Drill press



C. F. SHERMAN DRILL PRESS Filed Dec. 61, 1923 s sheets-sheet 1 Oct. 27,1925. 1,559,190

C. F. SHERMAN DRILL PRESS Filed Dec. 1923 3 Sheets-Sheet 2 Oct. 27,1925- c. F. SHERMAN DRILL PRESS Filed Dec. 31. 1923 3 Sheets-Sheet 5UNITED STATE PATENT OF FICE.

CORTIS r. sHERMAN, or HARTFORD, CONNECTICUT, ASSIGNOR To THE HENRY &WRIGHT MANUFACTURING COMPANY, or-HAR FoRD, CONNECTICUT, A CORPORA;

TION OF CONNECTICUT.

DRILL PRESS.

Application filed December 31, 1923 Serial No. 683,677.

To all whom it may concern:

Be it known that I, CoRTIs F. SHERMAN,

a citizen of the United States, residing at Hartford, in the county ofHartford and State of Connecticut, have invented a new and usefulImprovement in Drill Presses, of which the following is a specification.

This invention relates to drilling machines which haveone or a pluralityofrotatable spindles that are fed longitudinally down and up withrelation to the work.

The object of the invention is to provide a drilling machine of thischaracter with simple and conveniently manipulated mechanism which canbe quickly set so that the spindle or spindles may be fed down by hand,or can be set so that the spindle or spindles will be fed by powersemi-automatically, that is, down and up and then stop, or. can be setso that the spindle or spindles will have a full automatic feed, thatis, a down and up movement continuously until the machine is stopped. 1

In the accompanying drawings Figure 1 shows a side elevation of theupper part of a drill press provided with feed mechanism which embodiesthe invention. Fig. 2shows on larger scale a side elevation, with partsbroken away, of the feed adjusting and controlling mechanisms. Fig. 3shows a vertical section on the plane indicated by the dotted line 33 onFig. 2. Fig. 4 shows a vertical section on the plane indicated by thedotted line l--it on Fig. 1. Fig. 5 is ade: tail section on theplaneindicaited by the dotted line 5 section onthe plane indicated bythe dotted line 6-6 on Fig. 2. p f

The tool spindle 1 is rotatably mounted in and has a longitudinalreciprocation with the spindle feed sleeve 2 that is supported by thebracket 3 attached to the front of the pillar a in a common manner. Theupper end of the spindle has a longitudinal reciprocation through but isrotatable with the spindle-drive sleeve 5 that is mounted in a bearingarm 6 at the topof the pillar in the usual way. On the upper end of thedrive sleeve is the spindlerotating pulley 7 which is connected by abelt 8 with a pulley 9 attached to the upper end of the verticaldriveshaft 10 mounted at the back of the pillar. A belt tightener 11 isarranged at the top of the pillar to regulate the tension of the belt.

5 on Fig. 2. Fig. 6 is adetail Attached to the back ofthe spindle feedsleeve 'isa rack 12 and meshing with this rack is a pinion 18 on anarbor 14 that extends horiZontally back of the rack and is journalled inthe bracket 8. Atone end this arbor; is provided with a hand rod 15which may be turned so as'to rotate the pinion and through the'rack andfeed sleeve, feed the spindle down and up. The end of the pinio arboropposite the hand rod is connected with one end of a coiled spring 16,the other end of which spring isattachedto a box 17 that is fastenedtothe side of the supporting bracket. The spring connections are so madethat when the spindle is fed down thespring is tensioned and when'thehand bar is re leased the tension of the spring will rotate the pinionand feed the spindle up. By this meansthespindle may be'fed down and upby hand, or fed down by hand and returned by the spring. i

Rotatably mounted on the pinion arbor is a sleeve 18 provided with onemember 19 of a ratchetclutch, and keyed to this sleeve is a worm wheel20. The other member 21 of the ratchet clutch is splined on the pinionarbor and is yieldingly held againstthe member 19 by means of springplungers 22. This clutch permits the worm wheel when rotated to drivethe feed pinion and feed the tool shaft down, but allows the 1 feedpinion to be rotated by the hand rod for feeding the spindle downwithout turning the worm wheel.

Engaging the worm wheel is a worm 23 the shaft 24. of which is mountedin suitable bearings '1I1 a carrier 25 that is pivoted at one end to thesupporting bracket. On the end of the worm shaft adjacent to the pivotis a bevel gear 26 in mesh with which is a bevel gear27 on the lower endof the vertical feed shaft 28. The lower end of the feed shaft isjourna-lled in a hub 29 on the supporting bracket while the upper endofthe feed shaft is telescoped into a rotatable feed quill 30. The feedshaft and feed quill are splined so that they will rotate. as one butare capable of longitudinal extension and contraction to permit thebracket to be raised and lowered s of the pillar.

journalle'd in a casing 31 attached to the top Connectedto the top ofthefeed quill in the casing is a gear 32 meshing with which is a gear 33 onthe upper end of ashaft 34 that is journalled' in the casing 31. Keyedon the lower end of the shaft 34 is a cone pulley 35. This pulley isconnected by a belt 36 to the cone pulley 37 on the lower end of thespindle drive sleeve 5. By means of these co -operating elements thefeed worm is driven from and with relation to the spindle. 'By shiftingthe belt on these pulleys the speed of the shaft 34 may be altered andby changing the relative sizes of the gears 32 and 33 the speed of thefeed quill may be altered, thus by making such changes as may beelfected through these elements the speed of the feed pinion may bevaried very considerably in order to accommodate the operating feed of'the tool spindle to different kinds of work the tool may be required toperform. A belt tightener 38 may be provided for'keeping'the necessarytension of the belt 36.

Owing to its weight the carrier tends to swing down on its pivot anddraw the worm out of engagement with the worm wheel. A vertical rod 39slidably mounted on the supporting bracket has a collar 40 at its lowerend which extends under a part of the carrier. On this rod is a collar41 and thrusting between this latter collar and'a lug 42 projecting fromthebracket, is a spring 43, the tension of which draws up the rod andlifts the carrier so that the worm will engage with the worn wheel. Atrip latch 44 in the shape of an angle lever is pivoted to the frontpart of the supporting bracket in position to engage under a part of thecarrier and hold it up with the worm and worm wheel in mesh. A springplunger 45 engages the trip latch and tends to press it into lookingposition.

On a horizontally extending rod 46 rotatably and slidably mounted on thesupporting bracket is a cam 47 above the top of the rod 39 and a cam 48above the upper end of the latch 44. This rod has a handle 49 by meansof which it may be manipulated. Adjustably clamped on the spindle feedsleeve is a depth gage 50 which is provided with a trip screw 51 locatedin line with the cam 48. As the-tool spindle approaches the lower limitof its travel, when fed by the power feed with the worm and worm wheelengaged, the trip screw 51 engages and turns the cam 48. This cam whenso moved presses down the upper end of the latch 44 and causes the lowerend of the latch to swing out and release the carrier. At the same timethe cam 48 turns the rod 46 and cam 47, which latter cam thus turnedforces down the rod 39 compressing the spring 43 and allowing thecarrier to swing down under gravity so that the worm becomes disengagedfrom the worm wheel. As the rod 39 is forced down the tooth'52 of latch53, pivoted to the supporting bracket, is swung forward by the springplunger 54 soas to engage the collar 41 and hold therod 3-9 down withthe spring 43 under tension and the worm disengaged from the wormwjheel. As the worm becomes disengaged from the worm wheel the downwardfeed of the tool spindle ceases. The exact time of-this action isobtained by first adjusting the depth gage on the feed sleeve and thenadjusting the trip screw car ried by the depth gage. Immediately theworm and worm wheel become disengaged the spring at the end of the feedpinion arbor causes the upward movement of the tool spindle. .As thespindle rises the cams 47 and 48 are turned back to their normalposition by the spring 55 coiled ontherod 46.

lVhen the tool spindle approaches the upper limit of its travel thecollar 56 on thelower end of the feed sleeve engages with the. end of arod 57 that is adjustably fastened to and extends forward from the lowerend of the latch 53, and turns the latch so that therod 39 is releasedand the spring 43 is free to lift the carrier and cause the reengagementor" the worm and worm wheel.

A counterbalance weight 58, located in the pillar 4, is connected by achain 59 with the rack 12 for assisting the coiled spring 16, connectedwith thepinion arbor 14, in lifting the spindle. This weight permits ofthe use of a relatively light spring for effecting the return of thespindle. The chain is attached to a rod 60 that extends loosely throughthe weight and at its'lower endhas a spring 61 on which the weightrests. This spring cushions the weight when the spindle is raised andthe weight drops so as to relieve the parts from jar.

To eliminate shock when the spindle reaches the upper limit of itsmovement under the pull of the counterbalance weight and tension of thecoiled spring connected with the pinion arbor, suitable cushioning meansare'provided for arresting the upward movement of the spindle. Thesemeans may consist of plungers 62 resting on air, liquid or springs 63 insockets in the collar 56 at the lower end of the spindle. Then suchcushioning means are provided the plungers are adapted to engage withthe under sideofa part of the bracket 3 when the spindle is way'up andprevent shock when the spindle is stopped.

lVith the driving shaft made telescopic as shown, that is, consisting ofa shaft 28 entering a quill 29, the bracket may be raised and lowered onthe pillar in the common manner for locating the spindle nearer to orfurther from the work, as is desirable for eliiciency, without the shaftat any time extending above the top of the pillar. This allows theemployment of pulleys of any size on top of the pillar, as the driveshaft in any adjustment of the bracket can never interfere with thepulleys or belt.

When the machine is to be used with a full automatic feed the controlmechanisms are set so that the depth gage screw at the end of eachdownward movement of the tool spindle will engage the trip cam and causethe freeing of the carrier so that it will swing down and be temporarilyheld down with the worm and worm wheel disengaged, and then at the endof each upward movement of the spindle the latch that holds the carrierdown will be released and allow the spring to lift the carrier andreengage the worm and worm wheel. These movements can be continuedautomatically with the parts properly adjusted to give the requiredtravel down andup of the tool spindle as long as desired.

If it is desired to use the machine with a semi-automatic feed, that is,to allow the feed shaft to, through the gears, worm and worm wheel, feedthetool spindle downward and then become released so that the springwill feed the tool spindle upward and the feed stop, the parts areadjusted the same as described as for the full automatic feed exceptthat the rod 57 which extends from the latch 53 is pushed back so thatit will not be engaged by the collar 56 on the feed sleeve when thespindle reaches its upward limit.

' 'When the rod 57 is not thus engaged the latch 53 holds the carrierdown with the worm and worm wheel disengaged. A subsequent downwardpower feed may be obtained by pushing back the rod 46 against the latch53 and causing it to release the rod 39 so that the spring will be freeto lift the carrier and engage the worm and worm wheel. If it is desiredto feed the tool spin dle by hand, as previously described, the carriermay be retained down by the-latch 53, and then the feed sleeve moved upand down by the hand bar. It is possible to move the pinion for feedingthe tool spindle down faster than would be possible with theworm andworm wheel by-hand, owing to the provision of the ratchet clutch betweenthe worm wheel and the feed pinion arbor. V

Vith or without the worm and. worm wheel engaged the tool spindle may befed down by hand through the hand bar. .I/Vhen the full automaticoperation is required the depth gage screw 51 is set to engage the tripcam 48 at the lower limit of the travel of the tool spindle and causethe disengagement of the worm and worm wheel, and the rod 57 set to beengaged by the collar 56 on the feed sleeve at the limit of its upwardtravel so as to permit the worm and worm wheel to be engaged. Forsemi-automatic feed Work the rod 57 is adjusted so that it will not beengaged by the collar on,the feed sleeve at the upward limit of itstravel. Under this condition the tool spindle is fed down by power,released, lifted by the spring and then stops. The movements of thecarrier for engaging and disengaging the worm and worm wheel are slight,therefore are quickly accomplished and are made in such man- 1. In adrilling machine in combination with. the rotatory and reciprocatory'tool vspindle and 'means for rotating the spindle,

of a rack and pinion for reciprocating the spindle, a worm wheelconnected with the pinion shaft, a worm engaging the worm wheel, meansdriven from the spindle for rotating the worm, and means operableautomatically and by hand for engaging the worm with the worm wheel anddisengaging the worm from the worm wheel and effecting the feed andcessation of feed of the spindle.

2. In a drilling machine in combination with the rotatory andreciprocatory tool spindle and means for rotating the spindle, of a rackand pinion for reciprocating the spindle, a worm wheel connected withthe pinion shaft, a worm adapted to engage the worm wheel, means drivenfrom the spindle for rotating the worm, and means tripped by the upwardand downward movements of the spindle for automatically engaging thewormwith and disengaging the worm from the worm wheel.

3. In a drilling machine in combination with the rotatory andreciprocatory tool spindle and means for rotating the spindle, of arack. and pinion for reciprocating the spindle, a worm wheel connectedwith the pinion shaft, an oscillatory worm adapted to engage the wormwheel, means driven from the spindle for rotating the 'worm, and meansfor automatically oscillating the worm toward and from the worm wheelfor the purpose of engaging these members at the end of the returnmovement of the spindle and disengaging them at the end of the feedmovement of the spindle.

4. In a drilling machine in combination with the rotatory andreciprocatory tool spindle and means for rotating the spindle,

by the movements of the spindle for engaging the worm with anddisengaging the worm from the worm wheel and thus effecting thecontinuous alternate feed and re turn of the spindle.

5. In a drilling machine in combination with the rotatory andreciprocatory tool spindle and means for rotating the spindle, of a rackand pinion for reciprocating the spindle, a worm wheel, a ratchet clutchconnecting the worm wheel with the pinion shaft, a worm engaging theworm wheel, means driven from the spindle forrotating the worm, andmeans actuated by the move ments of the spindle for disengaging the wormfrom and engaging the worm with the worm wheel.

6. In a drilling machine in combination with the rotatory andreciprocatory tool spindle and means for rotating the spindle, of a rackand pinion for reciprocating the spindle, a worm wheel connected withthe pinion shaft, a worm engaging the worm wheel, means driven from thespindle for rotating the worm, means for rotating the pinion shaft byhand with the worm engaged with the worm wheel, and means fordisengaging the worm from the worm wheel.

7. In a drilling machine in combination with the rotatory andreciprocatory tool spindle and means for rotating the spindle, of a rackand pinion for reciprocating the spindle, a worm wheel, a ratchet clutchconnecting the worm wheel with the pinion shaft, means for rotating thepinion shaft by hand, a worm engaging the worm wheel, means driven fromthe spindle for rotating the worm, and means actuated by the movementsof the spindle for disengaging the worm from and engaging the worm withthe worm wheel.

8. In a drilling machine in combination with the rotary andreciprocatory tool spindle and means for rotating the spindle, of a rackand pinion for reciprocating the spindle a worm wheel connected with thepinion shaft, a worm engaging the worm wheel, means driven from thespindle for rotating the worm, a spring for engaging the worm with theworm wheel and means operable by hand for disengaging the worm from theworm wheel.

9. In a drilling machine in combination with the rotary andreciprocatory tool spindle and means for rotating the spindle, of araclcand pinion for reciprocating the spindle, a worm wheel connectedwith the pinion shaft. a worm adapted to engage the worm wheel, a springfor causing the engagement of the worm with the worm wheel, means forlocking the worm engaged with the worm wheel, means driven from thespindle for rotatin the worm, means operable by the downward movement ofthe spindle for releasing said locking means and allowing thedisengagement of the worm from the worm wheel, means operable by theclownward movement of the spindle for placing said spring under tension,means for retaining the spring under tension, and means operable by theupward movement of the spindle for releasing said retaining means andallowing the spring to engage the worm with the worm wheel.

10. In a drilling machine in combination with a rotatory andreciprocatory tool spindle and means for rotating the spindle, of a rackand pinion for reciprocating the spindle, a worm wheel connectedwith'the pinion shaft, a worm adapted to engage the worm wheel, aspring'for causing the engagement of the worm with the worm wheel, meansdriven from the spindle for rotating the worm, means actuated by thedownward iiovement of-the spindle for relieving the tension of saidspring and allowing the disengagement of the worm from the worm wheel,means for retaining the worm disengaged, and means actuated by theupward movement of the spindle for releasing said retaining means andallowing the spring to engage the worm with the worm'wheel.

11. In a drilling machine in combination with the rotatory andreciprocatory tool spindle and means for rotating the spindle, of aspring for feeding the spindle upward, a rack and pinion for feeding thespindle downward, a worm wheel connected with the pinion shaft, a wormengaging the worm wheel, means driven from the spindle for rotating theworm, a spring for engaging the worm with the worm wheel and means fordisengaging the worm from the worm wheel and at the same time placingsaid worm engaging spring under tension.

12. In a drilling machine in combination with the rotatory andreciprocatory tool spindle and means for rotating the spindle, of aspring for feeding the spindle upward, a rack and pinion for feeding thespindle downward, a worm wheel connected with the pinion shaft, a wormadapted to engage the worm wheel, a spring for causing the engagement ofthe worm with the worm wheel, means driven from the spindle for rotatingthe worm, means actuated by the downward movement of the spindle fordisengaging the worm from the worm wheel and allowing the feed spring tolift the spin dle, means for retaining the worm disengaged, and meansactuated by the upward movement of the spindle for releasing saidretaining means and allowing the worm elevating spring toengage the wormwith the worm wheel.

13. In a drilling machine in combination with the rotatory andreciprocatory tool spindle and means for rotating the spindle, of a rackand pinion for reciprocating the spindle, a worm wheel connected withthe pinion shaft, a worm engaging the worm wheel, a spring for engagingthe worm with the worm wheel, means for disengaging the worm from theworm wheel and placing the spring under tension, bevel gears forrotating the worm shaft, a telescopic shaft for driving the gears, andgearing driven from the spindle for rotating the telescopic shaft.

14. In a drilling machine in combination with the rotatory andreciprocatory tool spindle and means for rotating the spindle, of aspring for feeding the spindle upward, a rack and pinion for feeding thespindle downward, a worm wheel connected with the pinion shaft, a wormadapted to engage the worm wheel, a spring tensioned for engaging theworm with the worm wheel, means driven from the spindle for rotating theworm, means operated by the downward movement of the spindle forrelieving the action of said worm engaging spring and disengaging theworm from the worm wheel and allowing the feed spring to lift thespindle, means actuated by the upward movement of the spindle forreleasing the worm engaging spring and allowing it to engage the wormwith the worm wheel.

15. In a drilling machine in combination with the rotatory andreciprocatory tool spindle and means for rotating the spindle, of aspring for feeding the spindle upward, a rack and pinion for feeding thespindle downward, a worm wheel connected with the pinion shaft, a wormadapted to engage the worm wheel, a spring tensioned for engaging theworm with the worm wheel, means driven from the spindle for rotating theworm, means operated by the clownward movement of the spindle forrelieving the action of said worm engaging spring and for disengagingthe worm from the worm wheel and allowing the feed spring to lift thespindle, cushioning means for stopping the upward movement of thespindle, and means actuated by the upward movement of the spindle forreleasing the feed spring and allowing it to lift the spin dle.

1.6. In a drilling machine in combination with the rotatory andreciprocatory tool spindle and means for rotating the spindle, of meansfor feeding the spindle upward, a rack and pinion for feeding thespindle downward, a worm wheel connected with the pinion shaft, a wormadapted to engage the worm wheel, a spring for' engaging the worm withthe worm wheel, means driven from the spindle for rotating the worm,means actuated by the downward movement of the spindle for relieving theaction of said spring and allowing the worm to drop out of engagementwith the worm wheel, and means operated by the upward move- ,ment of thespindle for permitting the gagement of the worm with the worm wheel.

18. In a drilling machine in combination with the rotatory andreciprocatory tool spindle and means for rotating'the spindle, of a rackand pinion for reciprocating the spindle, a worm wheel connected withthe pinion shaft, a worm adapted to engage the worm wheel, a springarranged to engage the worm with the wormwheel, a latch adapted to holdthe worm and worm wheel engaged, a latch adapted to retain the wormdisengaged from the worm wheel with said spring under tension, meansmovable downward with the spindle for disengaging the former latch,means movable upward with the spindle for disengaging the latter latch,and means driven from the spindle for rotating the worm.

19. In a drilling machine in combination with the rotatory andreciprocatory tool spindle and means for rotating the spindle, of a rackand pinion for reciprocating the spindle, a worm wheel connected withthe pinion shaft, a worm adapted to engage the worm wheel, a springarranged to engage the worm with the worm wheel, a latch adapted to holdthe worm and worm wheel engaged, a latch adapted to retain the wormdisengaged from the worm wheel with said spring under tension, meansmovable with the spindle and by hand for disengaging said latches, andmeans driven from the spindle for rotating the worm.

CORTIS F. SHERMAN.

